Videos have four sided letter box using pyTivoX

Hey guys new to Tivo and was really excited to discover pyTivoX to transfer some HD shows from my mac to the tivo. For some reason it transfer it over and even puts it in the HD Recordings folder but when I play it it has bars on top bottom and sides, zooming in only kills the quality. Its a 720p mp4 file. See photo below:

I'm using pyTivoX 1.3, any help would be greatly appreciated. This would be really cool if I could get it to work.

Thanks that fixed it, one last problem tho I moved a MKV file and it works fine but moved a mp4 (h.264 /AAC) and it displays fine however half way through the audio gets off sync. It doesnt when played back on my mac but on the Tivo it gets off sync really bad. Anyway to fix this?